./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum60.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/rangesum60.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-16 23:20:12,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 23:20:12,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 23:20:12,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 23:20:12,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 23:20:12,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 23:20:12,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 23:20:12,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 23:20:12,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 23:20:12,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 23:20:12,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 23:20:12,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 23:20:12,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 23:20:12,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 23:20:12,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 23:20:12,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 23:20:12,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 23:20:12,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 23:20:12,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 23:20:12,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 23:20:12,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 23:20:12,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 23:20:12,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 23:20:12,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 23:20:12,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 23:20:12,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 23:20:12,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 23:20:12,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 23:20:12,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 23:20:12,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 23:20:12,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 23:20:12,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 23:20:12,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 23:20:12,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 23:20:12,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 23:20:12,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 23:20:12,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 23:20:12,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 23:20:12,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 23:20:12,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 23:20:12,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 23:20:12,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 23:20:12,210 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 23:20:12,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 23:20:12,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 23:20:12,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 23:20:12,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 23:20:12,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 23:20:12,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 23:20:12,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 23:20:12,213 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 23:20:12,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 23:20:12,214 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 23:20:12,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 23:20:12,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 23:20:12,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 23:20:12,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 23:20:12,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 23:20:12,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 23:20:12,215 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 23:20:12,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 23:20:12,215 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 23:20:12,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 23:20:12,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 23:20:12,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 23:20:12,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 23:20:12,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:20:12,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 23:20:12,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 23:20:12,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 23:20:12,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 23:20:12,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 23:20:12,218 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 23:20:12,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 23:20:12,218 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 23:20:12,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 23:20:12,218 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 23:20:12,219 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2023-02-16 23:20:12,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 23:20:12,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 23:20:12,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 23:20:12,467 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 23:20:12,467 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 23:20:12,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum60.i [2023-02-16 23:20:13,673 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 23:20:13,863 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 23:20:13,864 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2023-02-16 23:20:13,870 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d0c3f55e/7edf6ab0f66f470fbd2936be17c74682/FLAG50ba5cfb9 [2023-02-16 23:20:14,234 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d0c3f55e/7edf6ab0f66f470fbd2936be17c74682 [2023-02-16 23:20:14,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 23:20:14,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 23:20:14,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 23:20:14,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 23:20:14,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 23:20:14,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3def0fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14, skipping insertion in model container [2023-02-16 23:20:14,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 23:20:14,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 23:20:14,447 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2023-02-16 23:20:14,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:20:14,468 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 23:20:14,505 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2023-02-16 23:20:14,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:20:14,518 INFO L208 MainTranslator]: Completed translation [2023-02-16 23:20:14,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14 WrapperNode [2023-02-16 23:20:14,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 23:20:14,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 23:20:14,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 23:20:14,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 23:20:14,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,562 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-02-16 23:20:14,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 23:20:14,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 23:20:14,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 23:20:14,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 23:20:14,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 23:20:14,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 23:20:14,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 23:20:14,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 23:20:14,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (1/1) ... [2023-02-16 23:20:14,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:20:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:14,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 23:20:14,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 23:20:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 23:20:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 23:20:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 23:20:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 23:20:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 23:20:14,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 23:20:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 23:20:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-02-16 23:20:14,690 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-02-16 23:20:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 23:20:14,771 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 23:20:14,773 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 23:20:14,981 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 23:20:14,986 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 23:20:15,016 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 23:20:15,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:20:15 BoogieIcfgContainer [2023-02-16 23:20:15,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 23:20:15,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 23:20:15,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 23:20:15,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 23:20:15,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 11:20:14" (1/3) ... [2023-02-16 23:20:15,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704aa458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:20:15, skipping insertion in model container [2023-02-16 23:20:15,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:14" (2/3) ... [2023-02-16 23:20:15,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704aa458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:20:15, skipping insertion in model container [2023-02-16 23:20:15,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:20:15" (3/3) ... [2023-02-16 23:20:15,034 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2023-02-16 23:20:15,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 23:20:15,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 23:20:15,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 23:20:15,109 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ed3433, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 23:20:15,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 23:20:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 23:20:15,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:15,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:15,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash -275565944, now seen corresponding path program 1 times [2023-02-16 23:20:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:15,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436065915] [2023-02-16 23:20:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:15,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:15,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:15,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436065915] [2023-02-16 23:20:15,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 23:20:15,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17426044] [2023-02-16 23:20:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:15,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:15,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:15,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 23:20:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:15,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 23:20:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 23:20:15,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:20:15,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17426044] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:20:15,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:20:15,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 23:20:15,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757869862] [2023-02-16 23:20:15,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:20:15,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 23:20:15,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 23:20:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 23:20:15,512 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:15,536 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-16 23:20:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 23:20:15,539 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-16 23:20:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:15,545 INFO L225 Difference]: With dead ends: 52 [2023-02-16 23:20:15,545 INFO L226 Difference]: Without dead ends: 24 [2023-02-16 23:20:15,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 23:20:15,552 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:15,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-16 23:20:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-16 23:20:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-02-16 23:20:15,589 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2023-02-16 23:20:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:15,590 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-02-16 23:20:15,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-02-16 23:20:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 23:20:15,594 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:15,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:15,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 23:20:15,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-16 23:20:15,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1257002967, now seen corresponding path program 1 times [2023-02-16 23:20:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847552628] [2023-02-16 23:20:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:15,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847552628] [2023-02-16 23:20:15,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 23:20:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946010866] [2023-02-16 23:20:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:15,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:15,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:15,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:15,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 23:20:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-16 23:20:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:20:15,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:20:15,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946010866] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:20:15,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:20:15,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 23:20:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725050645] [2023-02-16 23:20:15,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:20:15,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 23:20:15,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 23:20:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:15,958 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 23:20:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:15,975 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-16 23:20:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 23:20:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-02-16 23:20:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:15,977 INFO L225 Difference]: With dead ends: 46 [2023-02-16 23:20:15,977 INFO L226 Difference]: Without dead ends: 26 [2023-02-16 23:20:15,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:15,980 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:15,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-16 23:20:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-16 23:20:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-16 23:20:15,988 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 29 [2023-02-16 23:20:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:15,989 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-16 23:20:15,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 23:20:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-16 23:20:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 23:20:15,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:15,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:15,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-16 23:20:16,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash -653100523, now seen corresponding path program 1 times [2023-02-16 23:20:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355736024] [2023-02-16 23:20:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:16,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:16,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355736024] [2023-02-16 23:20:16,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 23:20:16,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069745527] [2023-02-16 23:20:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:16,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:16,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:16,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 23:20:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-16 23:20:16,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 23:20:16,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:20:16,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069745527] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:20:16,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:20:16,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 23:20:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746486096] [2023-02-16 23:20:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:20:16,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 23:20:16,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 23:20:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:16,312 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:16,327 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2023-02-16 23:20:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 23:20:16,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-16 23:20:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:16,328 INFO L225 Difference]: With dead ends: 46 [2023-02-16 23:20:16,328 INFO L226 Difference]: Without dead ends: 28 [2023-02-16 23:20:16,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:16,330 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:16,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-16 23:20:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-02-16 23:20:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-16 23:20:16,335 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 31 [2023-02-16 23:20:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:16,336 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-16 23:20:16,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-16 23:20:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 23:20:16,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:16,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:16,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:16,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:16,543 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1081404920, now seen corresponding path program 1 times [2023-02-16 23:20:16,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:16,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298956649] [2023-02-16 23:20:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:16,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:16,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298956649] [2023-02-16 23:20:16,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 23:20:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036649100] [2023-02-16 23:20:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:16,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:16,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:16,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:16,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 23:20:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-16 23:20:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 23:20:16,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:20:16,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036649100] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:20:16,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:20:16,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 23:20:16,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342169389] [2023-02-16 23:20:16,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:20:16,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 23:20:16,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 23:20:16,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:16,682 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:16,704 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-02-16 23:20:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 23:20:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-02-16 23:20:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:16,706 INFO L225 Difference]: With dead ends: 44 [2023-02-16 23:20:16,706 INFO L226 Difference]: Without dead ends: 29 [2023-02-16 23:20:16,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:16,708 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:16,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-16 23:20:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-16 23:20:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-16 23:20:16,721 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 40 [2023-02-16 23:20:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:16,722 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-16 23:20:16,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-16 23:20:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-16 23:20:16,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:16,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:16,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:16,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash -673301430, now seen corresponding path program 1 times [2023-02-16 23:20:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:16,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186295650] [2023-02-16 23:20:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:16,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186295650] [2023-02-16 23:20:16,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 23:20:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991259357] [2023-02-16 23:20:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:16,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:16,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:17,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 23:20:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 23:20:17,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-16 23:20:17,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:20:17,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991259357] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:20:17,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:20:17,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 23:20:17,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496639489] [2023-02-16 23:20:17,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:20:17,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 23:20:17,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 23:20:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:17,100 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:17,117 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-02-16 23:20:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 23:20:17,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-02-16 23:20:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:17,119 INFO L225 Difference]: With dead ends: 55 [2023-02-16 23:20:17,119 INFO L226 Difference]: Without dead ends: 34 [2023-02-16 23:20:17,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:17,121 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:17,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-16 23:20:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-02-16 23:20:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-16 23:20:17,128 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 42 [2023-02-16 23:20:17,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:17,131 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-16 23:20:17,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-16 23:20:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-16 23:20:17,132 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:17,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:17,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:17,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:17,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1042180377, now seen corresponding path program 1 times [2023-02-16 23:20:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:17,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918173187] [2023-02-16 23:20:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:17,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 23:20:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:17,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 23:20:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:17,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-16 23:20:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:20:17,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918173187] [2023-02-16 23:20:17,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918173187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:20:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836425574] [2023-02-16 23:20:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:17,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:17,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:17,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:17,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 23:20:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:17,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 23:20:17,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 23:20:17,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:20:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 23:20:17,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836425574] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:20:17,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:20:17,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-16 23:20:17,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214464944] [2023-02-16 23:20:17,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:20:17,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 23:20:17,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 23:20:17,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:20:17,615 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:17,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:17,679 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2023-02-16 23:20:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 23:20:17,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2023-02-16 23:20:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:17,682 INFO L225 Difference]: With dead ends: 69 [2023-02-16 23:20:17,682 INFO L226 Difference]: Without dead ends: 42 [2023-02-16 23:20:17,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:20:17,684 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:17,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:20:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-16 23:20:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-02-16 23:20:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-02-16 23:20:17,690 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2023-02-16 23:20:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:17,690 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-02-16 23:20:17,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-02-16 23:20:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-16 23:20:17,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:17,692 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:17,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:17,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:17,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:17,899 INFO L85 PathProgramCache]: Analyzing trace with hash -604386836, now seen corresponding path program 2 times [2023-02-16 23:20:17,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:17,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992839242] [2023-02-16 23:20:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:17,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:18,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 23:20:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-16 23:20:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:18,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 23:20:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-16 23:20:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992839242] [2023-02-16 23:20:18,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992839242] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:20:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184671788] [2023-02-16 23:20:18,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:20:18,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:18,063 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:18,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 23:20:18,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:20:18,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:20:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:20:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-16 23:20:18,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:20:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-16 23:20:18,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184671788] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:20:18,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:20:18,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-16 23:20:18,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030100545] [2023-02-16 23:20:18,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:20:18,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 23:20:18,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:18,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 23:20:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-16 23:20:18,267 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-16 23:20:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:18,339 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2023-02-16 23:20:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 23:20:18,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2023-02-16 23:20:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:18,340 INFO L225 Difference]: With dead ends: 86 [2023-02-16 23:20:18,340 INFO L226 Difference]: Without dead ends: 56 [2023-02-16 23:20:18,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-16 23:20:18,342 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:18,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 112 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-16 23:20:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2023-02-16 23:20:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-02-16 23:20:18,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 57 [2023-02-16 23:20:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:18,348 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-02-16 23:20:18,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-16 23:20:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-02-16 23:20:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-16 23:20:18,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:18,350 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:18,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:18,553 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 948362870, now seen corresponding path program 1 times [2023-02-16 23:20:18,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:18,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934081030] [2023-02-16 23:20:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:18,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:20:18,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574510999] [2023-02-16 23:20:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:18,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:18,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:18,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:18,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 23:20:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 23:20:18,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-16 23:20:18,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:20:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-16 23:20:18,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934081030] [2023-02-16 23:20:18,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:20:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574510999] [2023-02-16 23:20:18,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574510999] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:20:18,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:20:18,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-02-16 23:20:18,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281781119] [2023-02-16 23:20:18,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:20:18,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 23:20:18,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 23:20:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-16 23:20:18,995 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:19,091 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2023-02-16 23:20:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 23:20:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2023-02-16 23:20:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:19,093 INFO L225 Difference]: With dead ends: 103 [2023-02-16 23:20:19,093 INFO L226 Difference]: Without dead ends: 75 [2023-02-16 23:20:19,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-16 23:20:19,094 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:19,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:20:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-16 23:20:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-02-16 23:20:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-02-16 23:20:19,106 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 78 [2023-02-16 23:20:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:19,106 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-02-16 23:20:19,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-02-16 23:20:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-16 23:20:19,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:19,108 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:19,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:19,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-16 23:20:19,318 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:19,319 INFO L85 PathProgramCache]: Analyzing trace with hash 468172686, now seen corresponding path program 2 times [2023-02-16 23:20:19,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:19,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051893897] [2023-02-16 23:20:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:19,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:19,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:20:19,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210904275] [2023-02-16 23:20:19,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:20:19,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:19,355 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:19,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 23:20:19,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:20:19,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:20:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-16 23:20:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-16 23:20:19,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:20:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-16 23:20:20,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051893897] [2023-02-16 23:20:20,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:20:20,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210904275] [2023-02-16 23:20:20,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210904275] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:20:20,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:20:20,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-02-16 23:20:20,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387258566] [2023-02-16 23:20:20,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:20:20,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 23:20:20,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:20,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 23:20:20,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 23:20:20,401 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:20,576 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2023-02-16 23:20:20,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-16 23:20:20,577 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 102 [2023-02-16 23:20:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:20,578 INFO L225 Difference]: With dead ends: 151 [2023-02-16 23:20:20,578 INFO L226 Difference]: Without dead ends: 123 [2023-02-16 23:20:20,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 23:20:20,580 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:20,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 236 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:20:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-16 23:20:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-02-16 23:20:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2023-02-16 23:20:20,590 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 102 [2023-02-16 23:20:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:20,590 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2023-02-16 23:20:20,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2023-02-16 23:20:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-16 23:20:20,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:20,592 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:20,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:20,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:20,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1075718590, now seen corresponding path program 3 times [2023-02-16 23:20:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:20,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982355509] [2023-02-16 23:20:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:20,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:20:20,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846828586] [2023-02-16 23:20:20,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:20:20,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:20,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:20,869 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:20,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 23:20:20,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 23:20:20,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:20:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 23:20:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 2190 trivial. 0 not checked. [2023-02-16 23:20:21,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:20:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2023-02-16 23:20:21,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:21,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982355509] [2023-02-16 23:20:21,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:20:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846828586] [2023-02-16 23:20:21,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846828586] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:20:21,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:20:21,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-02-16 23:20:21,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507836377] [2023-02-16 23:20:21,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:20:21,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 23:20:21,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:21,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 23:20:21,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-16 23:20:21,023 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:20:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:21,041 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2023-02-16 23:20:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 23:20:21,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2023-02-16 23:20:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:21,045 INFO L225 Difference]: With dead ends: 149 [2023-02-16 23:20:21,046 INFO L226 Difference]: Without dead ends: 129 [2023-02-16 23:20:21,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-16 23:20:21,047 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:21,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 53 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-16 23:20:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-02-16 23:20:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2023-02-16 23:20:21,078 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 150 [2023-02-16 23:20:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:21,080 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2023-02-16 23:20:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:20:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2023-02-16 23:20:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-16 23:20:21,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:21,087 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:21,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 23:20:21,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:21,293 INFO L85 PathProgramCache]: Analyzing trace with hash -379068284, now seen corresponding path program 4 times [2023-02-16 23:20:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:21,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804708141] [2023-02-16 23:20:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:21,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:20:21,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912822508] [2023-02-16 23:20:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 23:20:21,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:21,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:21,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:21,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 23:20:21,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 23:20:21,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:20:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-16 23:20:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-02-16 23:20:22,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:20:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-02-16 23:20:23,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:23,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804708141] [2023-02-16 23:20:23,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:20:23,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912822508] [2023-02-16 23:20:23,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912822508] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:20:23,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:20:23,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2023-02-16 23:20:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496955176] [2023-02-16 23:20:23,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:20:23,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-16 23:20:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-16 23:20:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2023-02-16 23:20:23,861 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:24,010 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2023-02-16 23:20:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-16 23:20:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 156 [2023-02-16 23:20:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:24,012 INFO L225 Difference]: With dead ends: 191 [2023-02-16 23:20:24,012 INFO L226 Difference]: Without dead ends: 157 [2023-02-16 23:20:24,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 216 SyntacticMatches, 34 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2023-02-16 23:20:24,014 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:24,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 262 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:20:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-16 23:20:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-02-16 23:20:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 152 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 163 transitions. [2023-02-16 23:20:24,022 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 163 transitions. Word has length 156 [2023-02-16 23:20:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:24,022 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 163 transitions. [2023-02-16 23:20:24,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 163 transitions. [2023-02-16 23:20:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-02-16 23:20:24,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:24,024 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:24,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:24,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-16 23:20:24,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:24,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1942589664, now seen corresponding path program 5 times [2023-02-16 23:20:24,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:24,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180932094] [2023-02-16 23:20:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:24,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:24,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:20:24,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784978830] [2023-02-16 23:20:24,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 23:20:24,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:24,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:24,285 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:24,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 23:22:56,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2023-02-16 23:22:56,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:22:56,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:22:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:22:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 3686 trivial. 0 not checked. [2023-02-16 23:22:56,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:22:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 3716 trivial. 0 not checked. [2023-02-16 23:22:56,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:22:56,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180932094] [2023-02-16 23:22:56,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:22:56,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784978830] [2023-02-16 23:22:56,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784978830] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:22:56,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:22:56,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-02-16 23:22:56,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398601863] [2023-02-16 23:22:56,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:22:56,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 23:22:56,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:22:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 23:22:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-16 23:22:56,842 INFO L87 Difference]: Start difference. First operand 157 states and 163 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:22:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:22:56,865 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2023-02-16 23:22:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 23:22:56,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 184 [2023-02-16 23:22:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:22:56,868 INFO L225 Difference]: With dead ends: 201 [2023-02-16 23:22:56,868 INFO L226 Difference]: Without dead ends: 169 [2023-02-16 23:22:56,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-16 23:22:56,870 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:22:56,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:22:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-16 23:22:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-16 23:22:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0548780487804879) internal successors, (173), 164 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:22:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2023-02-16 23:22:56,877 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 184 [2023-02-16 23:22:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:22:56,877 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2023-02-16 23:22:56,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:22:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2023-02-16 23:22:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-16 23:22:56,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:22:56,880 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 21, 21, 15, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:22:56,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 23:22:57,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 23:22:57,085 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:22:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:22:57,085 INFO L85 PathProgramCache]: Analyzing trace with hash 853335264, now seen corresponding path program 6 times [2023-02-16 23:22:57,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:22:57,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763323159] [2023-02-16 23:22:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:22:57,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:22:57,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:22:57,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893692884] [2023-02-16 23:22:57,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 23:22:57,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:22:57,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:22:57,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:22:57,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 23:22:57,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-16 23:22:57,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:22:57,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:22:57,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:22:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 332 proven. 16 refuted. 0 times theorem prover too weak. 3976 trivial. 0 not checked. [2023-02-16 23:22:57,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:22:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4308 trivial. 0 not checked. [2023-02-16 23:22:57,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:22:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763323159] [2023-02-16 23:22:57,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:22:57,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893692884] [2023-02-16 23:22:57,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893692884] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:22:57,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:22:57,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-16 23:22:57,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774838338] [2023-02-16 23:22:57,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:22:57,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 23:22:57,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:22:57,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 23:22:57,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-16 23:22:57,646 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:22:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:22:57,674 INFO L93 Difference]: Finished difference Result 213 states and 235 transitions. [2023-02-16 23:22:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 23:22:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 220 [2023-02-16 23:22:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:22:57,677 INFO L225 Difference]: With dead ends: 213 [2023-02-16 23:22:57,677 INFO L226 Difference]: Without dead ends: 181 [2023-02-16 23:22:57,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-16 23:22:57,678 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:22:57,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:22:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-16 23:22:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-16 23:22:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0511363636363635) internal successors, (185), 176 states have internal predecessors, (185), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:22:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2023-02-16 23:22:57,685 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 220 [2023-02-16 23:22:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:22:57,686 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2023-02-16 23:22:57,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:22:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2023-02-16 23:22:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-02-16 23:22:57,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:22:57,690 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 21, 21, 15, 10, 10, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:22:57,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 23:22:57,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 23:22:57,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:22:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:22:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash -840128276, now seen corresponding path program 7 times [2023-02-16 23:22:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:22:57,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908453872] [2023-02-16 23:22:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:22:57,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:22:57,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:22:57,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540320602] [2023-02-16 23:22:57,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 23:22:57,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:22:57,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:22:57,953 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:22:57,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 23:22:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:22:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:22:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:22:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 157 proven. 7 refuted. 0 times theorem prover too weak. 4244 trivial. 0 not checked. [2023-02-16 23:22:58,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:22:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 37 proven. 337 refuted. 0 times theorem prover too weak. 4034 trivial. 0 not checked. [2023-02-16 23:22:58,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:22:58,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908453872] [2023-02-16 23:22:58,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:22:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540320602] [2023-02-16 23:22:58,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540320602] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:22:58,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:22:58,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-02-16 23:22:58,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540205472] [2023-02-16 23:22:58,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:22:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 23:22:58,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:22:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 23:22:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-16 23:22:58,243 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:22:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:22:58,267 INFO L93 Difference]: Finished difference Result 249 states and 274 transitions. [2023-02-16 23:22:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 23:22:58,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 232 [2023-02-16 23:22:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:22:58,268 INFO L225 Difference]: With dead ends: 249 [2023-02-16 23:22:58,269 INFO L226 Difference]: Without dead ends: 193 [2023-02-16 23:22:58,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-16 23:22:58,270 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:22:58,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:22:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-16 23:22:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-16 23:22:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.047872340425532) internal successors, (197), 188 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:22:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2023-02-16 23:22:58,276 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 232 [2023-02-16 23:22:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:22:58,277 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2023-02-16 23:22:58,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:22:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2023-02-16 23:22:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-02-16 23:22:58,280 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:22:58,280 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 33, 33, 18, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:22:58,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 23:22:58,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:22:58,488 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:22:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:22:58,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1764241452, now seen corresponding path program 8 times [2023-02-16 23:22:58,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:22:58,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110638180] [2023-02-16 23:22:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:22:58,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:22:58,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:22:58,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499196137] [2023-02-16 23:22:58,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:22:58,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:22:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:22:58,536 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:22:58,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 23:22:58,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:22:58,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:22:58,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 23:22:58,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:22:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 549 proven. 57 refuted. 0 times theorem prover too weak. 4792 trivial. 0 not checked. [2023-02-16 23:22:58,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:22:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 93 proven. 835 refuted. 0 times theorem prover too weak. 4470 trivial. 0 not checked. [2023-02-16 23:22:58,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:22:58,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110638180] [2023-02-16 23:22:58,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:22:58,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499196137] [2023-02-16 23:22:58,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499196137] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:22:58,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:22:58,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-16 23:22:58,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683510556] [2023-02-16 23:22:58,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:22:58,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 23:22:58,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:22:58,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 23:22:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-16 23:22:58,942 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:22:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:22:58,986 INFO L93 Difference]: Finished difference Result 285 states and 314 transitions. [2023-02-16 23:22:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 23:22:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 268 [2023-02-16 23:22:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:22:58,988 INFO L225 Difference]: With dead ends: 285 [2023-02-16 23:22:58,988 INFO L226 Difference]: Without dead ends: 217 [2023-02-16 23:22:58,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-16 23:22:58,989 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:22:58,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:22:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-02-16 23:22:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2023-02-16 23:22:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0424528301886793) internal successors, (221), 212 states have internal predecessors, (221), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:22:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2023-02-16 23:22:58,996 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 268 [2023-02-16 23:22:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:22:58,996 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2023-02-16 23:22:58,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:22:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2023-02-16 23:22:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-02-16 23:22:59,001 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:22:59,001 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 57, 57, 42, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:22:59,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 23:22:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 23:22:59,209 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:22:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:22:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1339400532, now seen corresponding path program 9 times [2023-02-16 23:22:59,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:22:59,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691456336] [2023-02-16 23:22:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:22:59,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:22:59,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:22:59,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538528457] [2023-02-16 23:22:59,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:22:59,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:22:59,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:22:59,285 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:22:59,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 23:22:59,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-16 23:22:59,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:22:59,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 23:22:59,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:22:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2023-02-16 23:22:59,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:22:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2023-02-16 23:22:59,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:22:59,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691456336] [2023-02-16 23:22:59,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:22:59,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538528457] [2023-02-16 23:22:59,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538528457] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:22:59,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:22:59,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-16 23:22:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016910305] [2023-02-16 23:22:59,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:22:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 23:22:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:22:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 23:22:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-16 23:22:59,842 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 23:22:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:22:59,887 INFO L93 Difference]: Finished difference Result 333 states and 370 transitions. [2023-02-16 23:22:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 23:22:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 340 [2023-02-16 23:22:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:22:59,889 INFO L225 Difference]: With dead ends: 333 [2023-02-16 23:22:59,889 INFO L226 Difference]: Without dead ends: 241 [2023-02-16 23:22:59,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-16 23:22:59,890 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:22:59,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:22:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-16 23:22:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-02-16 23:22:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0720338983050848) internal successors, (253), 236 states have internal predecessors, (253), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:22:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 259 transitions. [2023-02-16 23:22:59,898 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 259 transitions. Word has length 340 [2023-02-16 23:22:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:22:59,898 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 259 transitions. [2023-02-16 23:22:59,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 23:22:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 259 transitions. [2023-02-16 23:22:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-02-16 23:22:59,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:22:59,901 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 60, 60, 42, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:22:59,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 23:23:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 23:23:00,109 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:23:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:23:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1389660628, now seen corresponding path program 10 times [2023-02-16 23:23:00,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:23:00,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387056775] [2023-02-16 23:23:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:23:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:23:00,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:23:00,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58021425] [2023-02-16 23:23:00,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 23:23:00,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:00,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:23:00,173 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:23:00,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 23:23:00,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 23:23:00,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:23:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 23:23:00,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:23:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 6252 proven. 301 refuted. 0 times theorem prover too weak. 7125 trivial. 0 not checked. [2023-02-16 23:23:00,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:23:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 2802 proven. 2546 refuted. 0 times theorem prover too weak. 8330 trivial. 0 not checked. [2023-02-16 23:23:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:23:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387056775] [2023-02-16 23:23:00,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:23:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58021425] [2023-02-16 23:23:00,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58021425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:23:00,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:23:00,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-02-16 23:23:00,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051246117] [2023-02-16 23:23:00,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:23:00,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 23:23:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:23:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 23:23:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-16 23:23:00,917 INFO L87 Difference]: Start difference. First operand 241 states and 259 transitions. Second operand has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:23:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:23:01,011 INFO L93 Difference]: Finished difference Result 405 states and 458 transitions. [2023-02-16 23:23:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 23:23:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 412 [2023-02-16 23:23:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:23:01,013 INFO L225 Difference]: With dead ends: 405 [2023-02-16 23:23:01,013 INFO L226 Difference]: Without dead ends: 289 [2023-02-16 23:23:01,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 792 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-16 23:23:01,014 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:23:01,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 147 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:23:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-16 23:23:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-02-16 23:23:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0598591549295775) internal successors, (301), 284 states have internal predecessors, (301), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:23:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 307 transitions. [2023-02-16 23:23:01,026 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 307 transitions. Word has length 412 [2023-02-16 23:23:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:23:01,027 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 307 transitions. [2023-02-16 23:23:01,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:23:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 307 transitions. [2023-02-16 23:23:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-02-16 23:23:01,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:23:01,031 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 90, 60, 60, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:23:01,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 23:23:01,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-16 23:23:01,239 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:23:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:23:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1144607532, now seen corresponding path program 11 times [2023-02-16 23:23:01,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:23:01,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780590125] [2023-02-16 23:23:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:23:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:23:01,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:23:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562734536] [2023-02-16 23:23:01,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 23:23:01,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:01,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:23:01,300 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:23:01,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 23:23:01,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-16 23:23:01,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:23:01,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 23:23:01,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:23:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 12531 proven. 301 refuted. 0 times theorem prover too weak. 16038 trivial. 0 not checked. [2023-02-16 23:23:01,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:23:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 1261 proven. 4121 refuted. 0 times theorem prover too weak. 23488 trivial. 0 not checked. [2023-02-16 23:23:01,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:23:01,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780590125] [2023-02-16 23:23:01,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:23:01,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562734536] [2023-02-16 23:23:01,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562734536] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:23:01,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:23:01,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2023-02-16 23:23:01,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037282659] [2023-02-16 23:23:01,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:23:01,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 23:23:01,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:23:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 23:23:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-16 23:23:01,948 INFO L87 Difference]: Start difference. First operand 289 states and 307 transitions. Second operand has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:23:02,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:23:02,052 INFO L93 Difference]: Finished difference Result 501 states and 570 transitions. [2023-02-16 23:23:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 23:23:02,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 556 [2023-02-16 23:23:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:23:02,055 INFO L225 Difference]: With dead ends: 501 [2023-02-16 23:23:02,055 INFO L226 Difference]: Without dead ends: 337 [2023-02-16 23:23:02,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1078 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-16 23:23:02,056 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:23:02,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 74 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:23:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-02-16 23:23:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2023-02-16 23:23:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0993975903614457) internal successors, (365), 332 states have internal predecessors, (365), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:23:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 371 transitions. [2023-02-16 23:23:02,066 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 371 transitions. Word has length 556 [2023-02-16 23:23:02,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:23:02,066 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 371 transitions. [2023-02-16 23:23:02,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:23:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 371 transitions. [2023-02-16 23:23:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2023-02-16 23:23:02,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:23:02,079 INFO L195 NwaCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:23:02,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-16 23:23:02,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 23:23:02,286 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:23:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:23:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash 832504364, now seen corresponding path program 12 times [2023-02-16 23:23:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:23:02,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776805876] [2023-02-16 23:23:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:23:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:23:02,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:23:02,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445126482] [2023-02-16 23:23:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 23:23:02,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:02,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:23:02,343 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:23:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 23:23:03,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-02-16 23:23:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:23:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 23:23:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:23:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 21132 proven. 100 refuted. 0 times theorem prover too weak. 29742 trivial. 0 not checked. [2023-02-16 23:23:03,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:23:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 50874 trivial. 0 not checked. [2023-02-16 23:23:03,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:23:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776805876] [2023-02-16 23:23:03,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:23:03,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445126482] [2023-02-16 23:23:03,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445126482] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:23:03,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:23:03,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-02-16 23:23:03,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092269738] [2023-02-16 23:23:03,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:23:03,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 23:23:03,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:23:03,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 23:23:03,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-16 23:23:03,552 INFO L87 Difference]: Start difference. First operand 337 states and 371 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:23:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:23:03,606 INFO L93 Difference]: Finished difference Result 549 states and 625 transitions. [2023-02-16 23:23:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 23:23:03,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 700 [2023-02-16 23:23:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:23:03,608 INFO L225 Difference]: With dead ends: 549 [2023-02-16 23:23:03,608 INFO L226 Difference]: Without dead ends: 361 [2023-02-16 23:23:03,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1376 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-16 23:23:03,610 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:23:03,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 128 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:23:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-02-16 23:23:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2023-02-16 23:23:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 356 states have (on average 1.0926966292134832) internal successors, (389), 356 states have internal predecessors, (389), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:23:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 395 transitions. [2023-02-16 23:23:03,620 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 395 transitions. Word has length 700 [2023-02-16 23:23:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:23:03,621 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 395 transitions. [2023-02-16 23:23:03,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:23:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 395 transitions. [2023-02-16 23:23:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-02-16 23:23:03,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:23:03,626 INFO L195 NwaCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:23:03,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-16 23:23:03,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:03,837 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:23:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:23:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash 792981572, now seen corresponding path program 13 times [2023-02-16 23:23:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:23:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050142730] [2023-02-16 23:23:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:23:03,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:23:03,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:23:03,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22686138] [2023-02-16 23:23:03,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 23:23:03,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:03,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:23:03,891 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:23:03,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 23:23:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:23:04,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 23:23:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:23:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 13557 proven. 1365 refuted. 0 times theorem prover too weak. 36436 trivial. 0 not checked. [2023-02-16 23:23:04,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:23:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 2637 proven. 22495 refuted. 0 times theorem prover too weak. 26226 trivial. 0 not checked. [2023-02-16 23:23:05,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:23:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050142730] [2023-02-16 23:23:05,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:23:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22686138] [2023-02-16 23:23:05,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22686138] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:23:05,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:23:05,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2023-02-16 23:23:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045533728] [2023-02-16 23:23:05,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:23:05,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 23:23:05,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:23:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 23:23:05,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 23:23:05,245 INFO L87 Difference]: Start difference. First operand 361 states and 395 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:23:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:23:05,337 INFO L93 Difference]: Finished difference Result 600 states and 670 transitions. [2023-02-16 23:23:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-16 23:23:05,338 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 724 [2023-02-16 23:23:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:23:05,339 INFO L225 Difference]: With dead ends: 600 [2023-02-16 23:23:05,340 INFO L226 Difference]: Without dead ends: 364 [2023-02-16 23:23:05,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1384 SyntacticMatches, 31 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 23:23:05,342 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:23:05,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 123 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:23:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-02-16 23:23:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2023-02-16 23:23:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.0919220055710306) internal successors, (392), 359 states have internal predecessors, (392), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:23:05,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 398 transitions. [2023-02-16 23:23:05,356 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 398 transitions. Word has length 724 [2023-02-16 23:23:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:23:05,357 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 398 transitions. [2023-02-16 23:23:05,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 23:23:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 398 transitions. [2023-02-16 23:23:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2023-02-16 23:23:05,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:23:05,363 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:23:05,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-16 23:23:05,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:05,572 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:23:05,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:23:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash -91827407, now seen corresponding path program 14 times [2023-02-16 23:23:05,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:23:05,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175577863] [2023-02-16 23:23:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:23:05,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:23:05,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:23:05,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66792680] [2023-02-16 23:23:05,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:23:05,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:05,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:23:05,635 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:23:05,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 23:23:06,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:23:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:23:06,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-16 23:23:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:23:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 21850 proven. 484 refuted. 0 times theorem prover too weak. 30635 trivial. 0 not checked. [2023-02-16 23:23:06,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:23:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52485 trivial. 0 not checked. [2023-02-16 23:23:06,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:23:06,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175577863] [2023-02-16 23:23:06,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:23:06,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66792680] [2023-02-16 23:23:06,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66792680] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:23:06,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:23:06,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-02-16 23:23:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997281758] [2023-02-16 23:23:06,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:23:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 23:23:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:23:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 23:23:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 23:23:06,922 INFO L87 Difference]: Start difference. First operand 364 states and 398 transitions. Second operand has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:23:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:23:07,025 INFO L93 Difference]: Finished difference Result 603 states and 691 transitions. [2023-02-16 23:23:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-16 23:23:07,026 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 733 [2023-02-16 23:23:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:23:07,028 INFO L225 Difference]: With dead ends: 603 [2023-02-16 23:23:07,028 INFO L226 Difference]: Without dead ends: 412 [2023-02-16 23:23:07,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1464 GetRequests, 1418 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 23:23:07,030 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:23:07,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:23:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-16 23:23:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2023-02-16 23:23:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 407 states have (on average 1.0810810810810811) internal successors, (440), 407 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:23:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2023-02-16 23:23:07,041 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 733 [2023-02-16 23:23:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:23:07,042 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2023-02-16 23:23:07,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 23:23:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2023-02-16 23:23:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2023-02-16 23:23:07,048 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:23:07,048 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 46, 46, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:23:07,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-16 23:23:07,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:07,258 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:23:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:23:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1952749311, now seen corresponding path program 15 times [2023-02-16 23:23:07,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:23:07,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468001232] [2023-02-16 23:23:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:23:07,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:23:07,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:23:07,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851394580] [2023-02-16 23:23:07,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:23:07,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:23:07,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:23:07,316 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:23:07,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process